Spark-plug attachment.



VG. M. SHERRILL.

SPARK PLUG ATTACHMENT. APPLICATION FILED waits, ma.

1,29%126 v Patented Mar. 1,1919.

@UY M. SHERRILL, OEEASTLAND, TEXhS.

SPARK-PLUG arracnrann'r'.

Specification of Letters Patent.

Patented Mar. 4i, 11ers.

Application filed Jul 1615,1918. Serial No. 240,289.

To all whom it may concern:

Be it known that I, GUY M. Susanna, a citizen of the United States, residin at Eastland, in the county of Eastland an State of Texas, have invented a new and useful Spark- Plug Attachment, of which the following is a specification. y

The'subject of this invention is a spark plug attachment and the objects of this in vention are, first to produce an attachment which will render the plug useful even after the porcelain is badly cracked or broken, second, to provide an attachment which will prevent short circuiting when the insulating jacket of the spark plug is broken, third, to provide a simple, durable and eflicient spark lug.

With the foregoing and other objects in view which will appear as the description proceeds, the invention resides in the combination and arrangementof parts and in th details of construction hereinafter described and claimed, it being understood that changes in the precise embodiment of the invention herein disclosed, can be madev Within the scope of what is claimed, without departing from the spirit of the invention.

A practical embodimentof the invention is shown in the accompanying drawing, wherein Figure 1 is a view in elevation o f the de- I vice shown attached to a plug;

; Fig. 2 is a section on the line 2-2 of Fig. 1. Referring to the drawings by numerals of reference y In carryin out the invention there is provided a brac et arm formed, preferably, of

two strips 1 of sheet metal which are clamped together by rivets 2 or otherwise.

One of the ends 3 of these strips is angled and provided with opposed transverse grooves 4'. The extreme ends of these upturned portions are clamped together by the screw bolt 5 or otherwise. The grooves 4 as will be seen, lie between the outer or end rivet 2 and the screw bolt 5.

Adjacent the other-end of the strips 1 opposed transverse grooves 6 are formed. These grooves are sllghtly tapering, as shown to terminal 10 of the spark plug.

While a specific form of bracket arm has been shown and described, it is to be understood that any form of clamp or arm capable of holding the wire in proper spaced relation to the terminal may be used.

When thespark plug is provided with this attachment a disruptive discharge under high tension is the only discharge possible. This will cause a sparking at the regular spark gap which will ignite the charge in the engine cylinder even though the porcelain casing of the plug be cracked and broken.

' If, under such circumstances, the wire 9 and terminal 10 were connected in the usual way,'the current would be short circuitedbetween the binding post 10 and the metal casing 11 without the production of the de sired spark.

Having thus described the invention, what is claimed as new and sought by Letters ent, is

The combination with a spark plug including an insulating casing, and a terminal, of a bracket adapted to encircle the casing and having an upturned extending end, a

line wire clamped in the upturned end and held in spaced relation to the terminal, and means for clamping the upturned end about .the wire.

In testimony that I claim the foregoing as my own, I have hereto aflixed my signature I in the presence of two witnesses.

GUY M. 'SHERRILL.

Witnesses:

J.'A. RUssELL, H. H. Ru'ssm. 

